DE69728492T2 - Apparatus and method for coating sensitive circuits by thermal spraying - Google Patents
Apparatus and method for coating sensitive circuits by thermal spraying Download PDFInfo
- Publication number
- DE69728492T2 DE69728492T2 DE69728492T DE69728492T DE69728492T2 DE 69728492 T2 DE69728492 T2 DE 69728492T2 DE 69728492 T DE69728492 T DE 69728492T DE 69728492 T DE69728492 T DE 69728492T DE 69728492 T2 DE69728492 T2 DE 69728492T2
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- integrated circuit
- circuit
- coating
- mist
- coolant
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- 238000000576 coating method Methods 0.000 title claims description 59
- 239000011248 coating agent Substances 0.000 title claims description 47
- 238000000034 method Methods 0.000 title claims description 16
- 238000007751 thermal spraying Methods 0.000 title description 4
- 239000002245 particle Substances 0.000 claims description 28
- 239000002826 coolant Substances 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 11
- 239000003595 mist Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 7
- 239000008199 coating composition Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000000873 masking effect Effects 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims 3
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 239000000203 mixture Substances 0.000 description 21
- 239000011253 protective coating Substances 0.000 description 15
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- 239000007858 starting material Substances 0.000 description 7
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
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- 239000004416 thermosoftening plastic Substances 0.000 description 3
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
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- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
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- 239000000155 melt Substances 0.000 description 2
- KELHQGOVULCJSG-UHFFFAOYSA-N n,n-dimethyl-1-(5-methylfuran-2-yl)ethane-1,2-diamine Chemical compound CN(C)C(CN)C1=CC=C(C)O1 KELHQGOVULCJSG-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
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- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
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- 229910052745 lead Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920003209 poly(hydridosilsesquioxane) Polymers 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- -1 siloxanes Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/6715—Apparatus for applying a liquid, a resin, an ink or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
- B05B12/124—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to distance between spray apparatus and target
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0242—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects being individually presented to the spray heads by a rotating element, e.g. turntable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/57—Protection from inspection, reverse engineering or tampering
- H01L23/573—Protection from inspection, reverse engineering or tampering using passive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
- H01L2224/85909—Post-treatment of the connector or wire bonding area
- H01L2224/8592—Applying permanent coating, e.g. protective coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/095—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00 with a principal constituent of the material being a combination of two or more materials provided in the groups H01L2924/013 - H01L2924/0715
- H01L2924/097—Glass-ceramics, e.g. devitrified glass
- H01L2924/09701—Low temperature co-fired ceramic [LTCC]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16195—Flat cap [not enclosing an internal cavity]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Nozzles (AREA)
- Coating By Spraying Or Casting (AREA)
Description
Die Erfindung betrifft Verfahren für das Auftragen von Schutz- und Sicherheitsbeschichtungen auf integrierte Schaltungen, Mehrchip-Module und andere elektronische Bauteile.The The invention relates to methods for the application of protective and safety coatings on integrated Circuits, multi-chip modules and other electronic components.
Elektronische Schaltungen, wie beispielsweise integrierte Schaltungen und Mehrchip-Module, werden beschichtet, um Manipulationen zu verhindern oder um unerlaubte Produktanalysen zu erschweren. Die Patentschriften US-A-5,366,441 und US-A-5,258,334 sind Beispiele herkömmlicher Beschichtungsverfahren, bei denen unter Verwendung einer Maske eine Beschichtungszusammensetzung als Flüssigkeit auf die Schaltung aufgetragen wird und wo anschließend die beschichtete Schaltung erwärmt wird, um die Beschichtung auszuhärten. Die Beschichtung kann aus einem Silika-Precursor bestehen, wie beispielsweise Wasserstoff-Silsesquioxan-Harz (H-Harz) und einem Füllstoff. US-A-5,366,441 lehrt, den Mikroschaltungschip mit der Precursor-Beschichtung in einem Lindberg-Ofen bis zu sechs Stunden auf eine Temperatur von über 400°C zu erwärmen, wodurch die Beschichtung zu einer Glas- oder Keramikmatrix umgewandelt wird. Bei dem Füllstoff kann es sich um ein Material handeln, das Röntgenstrahlen so absorbiert (dämpft), dass eine Beschichtung entsteht, die bei einer Durchstrahlungsprüfung und/oder einer visuellen Prüfung ein lichtundurchlässiges Bild erbringt. Bei dem Harz kann es sich einfach um ein lichtundurchlässiges Harz handeln, das die Schaltung verbirgt (und so eine visuelle Inspektion verhindert). US-A-5,258,334 verwendet außerdem eine sekundäre Beschichtung, die chemisch aufgedampft und/oder per Ionenstrahl aufgebracht wird. Ein Nachteil bei diesen Verfahren ist, dass die Beschichtungsmischung auf eine teilweise vorgefertigte Schaltung (d. h. die Chipoberfläche) aufgebracht wird, bevor die Chipanschlüsse, die Drahtbonds und andere Schaltungsverbindungen hergestellt werden. Weil die Beschichtung nicht die schluss endliche Schaltung bedeckt, ist jede elektromagnetische Abschirmung und Strahlungsabschirmung bestenfalls marginal und unter extremen Bedingungen ineffektiv, wie beispielsweise beim Einsatz in Raumschiffen und Kernkraftanlagen. Verfahren wie die oben erwähnten erfordern auch lange Verarbeitungszeiten und hohe Verarbeitungstemperaturen, wodurch sie für das Beschichten filigraner Schaltungen inakzeptabel riskant sind und für die Massenproduktion kostengünstiger beschichteter Schaltungen nicht in Frage kommen. Ein weiterer Nachteil, der US-A-5,258,334 anhängt, ist, dass das Abscheiden der Sekundärbeschichtung teure und komplizierte Abscheidungskammern und lange Verarbeitungszeiten erfordert.electronic Circuits, such as integrated circuits and multi-chip modules coated to prevent tampering or unauthorized Complicate product analysis. The patents US-A-5,366,441 and US-A-5,258,334 are examples of conventional coating processes, in which, using a mask, a coating composition as liquid is applied to the circuit and where subsequently the heated circuit heated is used to cure the coating. The coating may consist of a silica precursor, such as Hydrogen silsesquioxane resin (H-resin) and a filler. US-A-5,366,441 teaches the microcircuit chip with the precursor coating in one Lindberg oven to heat up to six hours to a temperature of over 400 ° C, thereby the coating is converted to a glass or ceramic matrix. at the filler it can be a material that absorbs x-rays like this (muffles) that a coating is formed, which during a radiographic examination and / or a visual examination opaque Picture provides. The resin may simply be an opaque resin act that hides the circuit (and so a visual inspection ) Prevented. US-A-5,258,334 also uses a secondary coating which chemically evaporated and / or applied by ion beam. A disadvantage with these procedures is that the coating mixture on a partially prefabricated circuit (i.e., the chip surface) applied before the chip connections, the wire bonds and other circuit connections are made. Because the coating does not cover the final circuit, is any electromagnetic shielding and radiation shielding at best marginal and ineffective under extreme conditions, such as when used in spaceships and nuclear power plants. Procedures like the ones mentioned above also require long processing times and high processing temperatures, making them for Coating filigree circuits are unacceptably risky and for mass production cost-effective coated circuits are out of the question. Another disadvantage that Appended to US-A-5,258,334, is that the deposition of secondary coating expensive and complicated Deposition chambers and long processing times required.
Die deutsche Patentschrift Nr. 3318931 lehrt – gemäß dem Oberbegriff sowohl von Anspruch 1 als auch von Anspruch 7 – das Anbringen einer integrierten Schaltung an einer Spannvorrichtung eines Haltemittels, das Sprühen von Teilchen in den Flammennebel eines Sprühmittels zum Umwandeln der Teilchen in geschmolzene Tröpfchen und das Verstellen der Entfernung zwischen dem Haltemittel und dem Sprühmittel.The German Patent No. 3318931 teaches - according to the preamble of both Claim 1 and of claim 7 - the attachment of an integrated Circuit on a jig of a holding means, the spraying of Particles in the flame mist of a spray to convert the Particles in molten droplets and adjusting the distance between the holding means and the spraying means.
Eine Aufgabe der vorliegenden Erfindung ist das Aufbringen von Schutzbeschichtungen und Sicherheitsbeschichtungen auf Schaltungen, wie beispielsweise integrierte Schaltungen, Mehrchip-Module und ähnliche filigrane elektronische Schaltungen.A The object of the present invention is the application of protective coatings and security coatings on circuits such as integrated circuits, multi-chip modules and similar filigree electronic Circuits.
Eine weitere Aufgabe der vorliegenden Erfindung ist das Bereitstellen eines wiederholbaren, mit niedrigem Arbeitsaufwand verbundenen Massenproduktionsprozesses zum Aufbringen einheitlicher Schutz- und Sicherheitsbeschichtungen von präziser Dicke auf integrierte Schaltungen, Mehrchip-Module und ähnliche filigrane elektronische Bauteile und Schaltungsanordnungen.A Another object of the present invention is the provision a repeatable, low-effort mass production process for applying uniform protective and safety coatings of precise thickness on integrated circuits, multi-chip modules and the like filigree electronic components and circuit arrangements.
Gemäß der Erfindung werden diese Aufgaben durch die kennzeichnenden Merkmale erreicht, die in den unabhängigen Ansprüchen beschrieben sind.According to the invention These tasks are achieved by the characterizing features that in the independent ones claims are described.
Die vorliegende Erfindung stellt eine Beschichtungsvorrichtung nach Anspruch 1 bereit.The The present invention provides a coating apparatus Claim 1 ready.
Die Vorrichtung kann die Merkmale eines oder mehrerer der abhängigen Ansprüche 2 bis 6 enthalten.The Device may have the features of one or more of the dependent claims 2 to 6 included.
Die vorliegende Erfindung stellt außerdem ein Verfahren nach Anspruch 7 bereit.The the present invention also sets The method of claim 7 ready.
Das Verfahren kann die Merkmale eines oder mehrerer der abhängigen Ansprüche 8 bis 10 enthalten.The Method may include the features of one or more of the dependent claims 8 to 10 included.
Geschmolzene Tröpfchen, die mit einem Sprühmittel aufgesprüht werden, treffen sanft auf der Schaltung auf, wo sie aushärten und fest werden. Die Entfernung zwischen dem Sprühmittel und der Schaltung wird so gesteuert, dass die Tröpfchen an der Stelle, an der sie auf die Schaltung auftreffen, im geschmolzenen Zustand bleiben, ohne dass jedoch die Schaltung übermäßig erwärmt wird. Größe bzw. Masse der Tröpfchen werden so gewählt, dass die Kräfte minimiert werden, die auf die Schaltungsbauteile einwirken. Über alle Schaltungsbauteile hinweg wird eine gewünschte Schicht der Beschichtungszusammensetzung (die nach dem Abkühlen aushärtet) aufgebaut, indem der Sprühnebel in mehreren Durchgängen auf die Schaltung aufgebracht wird. Die integrierte Schaltung wird in eine Spannvorrichtung eingesetzt, die aus einem gut wärmeleitenden Material wie beispielsweise Aluminium besteht, wobei zu der Spannvorrichtung ein Kühlmittel geleitet wird, um die Spannvorrichtung und die integrierte Schaltung zu kühlen.Molten droplets that are sprayed with a spray gently strike the circuit where they harden and solidify. The distance between the spray and the circuit is controlled so that the droplets remain in the molten state at the point where they strike the circuit, but without overheating the circuit. The size or mass of the droplets are chosen so as to minimize the forces acting on the circuit components. Across all circuit components, a desired layer of the coating composition (which cures upon cooling) is built up by applying the spray to the circuit in multiple passes. The integrated circuit is used in a clamping device made of a good heat conducting material such as aluminum, wherein to the tensioning device a coolant is passed to cool the tensioning device and the integrated circuit.
Gemäß der Erfindung wird ein Ausgangsmaterial, wie beispielsweise ein hoch-dichtes Schwermetall für Strahlenschutz, in Teilchen-, Stab- oder Drahtform in die Wärmequelle (Flamme oder Plasma) einer thermischen Sprühkanone eingeführt, welche das Ausgangsmaterial zu schmelzflüssigen Tröpfchen schmilzt, die durch die Flamme (Wärmequelle) auf die Schaltung geschleudert werden.According to the invention becomes a source material, such as a high-density heavy metal for radiation protection, in particle, rod or wire form into the heat source (flame or plasma) a thermal spray gun introduced, which melts the starting material into molten droplets passing through the flame (heat source) be thrown on the circuit.
Gemäß der Erfindung wird eine Maske über Regionen der Schaltung gelegt, wo keine Beschichtung gewünscht wird. Die Maske ist aus einem wärmebeständigen Material aufgebaut, das kein guter Wärmeleiter ist.According to the invention becomes a mask over regions the circuit where no coating is desired. The mask is off a heat-resistant material built, that is not a good conductor of heat is.
Gemäß einem Aspekt der Erfindung wird die Spannvorrichtung durch die Wärmequelle hindurch gedreht, und die Wärmequelle wird schrittweise über die integrierte Schaltung, das Mehrchip-Modul oder den Hybridschaltkreis geführt, so dass eine Beschichtung von einer gewünschten Dicke entsteht.According to one Aspect of the invention is the tensioning device by the heat source rotated through, and the heat source will be phased over integrated circuit, the multi-chip module or the hybrid circuit guided, so that a coating of a desired thickness is formed.
Weitere Aufgaben, Vorteile und Merkmale der Erfindung ergeben sich klar aus der folgenden Besprechung einer oder mehrerer Ausführungsformen.Further Objects, advantages and features of the invention will become clear from the following discussion of one or more embodiments.
In
Die
Schaltung
Die
Schaltung
Die
Chemie der Zusammensetzung
Die
Ausgangsmaterialzusammensetzung
Wie
oben angesprochen, kann es sich bei der Wärmequelle
Wie
in
Die
lamellare lichtundurchlässige
Schutzbeschichtung
Die
geschmolzenen verflüssigten
Teilchen
Im
Gegensatz zu der lichtundurchlässigen Schutzbeschichtung
Die
Beschichtungen für
die Strahlungsschutzverbesserung und den EMS-Schutz können mittels
des thermischen Sprühprozesses
Die
gebildete EMS-Beschichtung und die gebildete Strahlungsbeschichtung
bedecken vollständig
die lichtundurchlässige
Beschichtung
Die
Grundschichtzusammensetzung kann in 1 bis 60 Minuten auf die Grundschicht
In
In
Die
Arme drehen sich mit 1.000 U/min und führen die integrierte Schaltung
durch die Flammfront. Bei jedem Durchgang baut sich die Schicht
aus abgekühlten
geschmolzenen Beschichtungsteilchen auf der Oberseite oder der Seite
der integrierten Schaltung
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/751,146 US5762711A (en) | 1996-11-15 | 1996-11-15 | Coating delicate circuits |
US751146 | 1996-11-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69728492D1 DE69728492D1 (en) | 2004-05-13 |
DE69728492T2 true DE69728492T2 (en) | 2005-02-24 |
Family
ID=25020688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE69728492T Expired - Fee Related DE69728492T2 (en) | 1996-11-15 | 1997-11-11 | Apparatus and method for coating sensitive circuits by thermal spraying |
Country Status (3)
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US (2) | US5762711A (en) |
EP (1) | EP0842707B1 (en) |
DE (1) | DE69728492T2 (en) |
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US6573124B1 (en) * | 1999-05-03 | 2003-06-03 | Hughes Electronics Corp. | Preparation of passivated chip-on-board electronic devices |
US6335224B1 (en) * | 2000-05-16 | 2002-01-01 | Sandia Corporation | Protection of microelectronic devices during packaging |
US7005404B2 (en) * | 2000-12-20 | 2006-02-28 | Honda Motor Co., Ltd. | Substrates with small particle size metal oxide and noble metal catalyst coatings and thermal spraying methods for producing the same |
BR0208927A (en) * | 2001-05-10 | 2004-04-27 | Parker Hannifin Corp | Fabrication of electronics components that have a metallic shield layer |
US7723162B2 (en) * | 2002-03-22 | 2010-05-25 | White Electronic Designs Corporation | Method for producing shock and tamper resistant microelectronic devices |
EP1547126A2 (en) * | 2002-08-05 | 2005-06-29 | The Research Foundation Of State University Of New York | System and method for manufacturing embedded conformal electronics |
US7208046B1 (en) | 2003-01-10 | 2007-04-24 | White Electronic Designs Corporation | Spray coating apparatus and fixtures |
US8210120B2 (en) * | 2003-01-10 | 2012-07-03 | Microsemi Corporation | Systems and methods for building tamper resistant coatings |
US7758911B2 (en) | 2003-05-08 | 2010-07-20 | Honeywell International Inc. | Microelectronic security coatings |
DE102004018483B4 (en) * | 2004-04-14 | 2007-11-29 | Infineon Technologies Ag | Method of applying coatings to ribbon-like structures in semiconductor device fabrication and use of a device for applying coatings to ribbon-like structures |
US20060067055A1 (en) * | 2004-09-30 | 2006-03-30 | Heffner Kenneth H | Thermally conductive composite and uses for microelectronic packaging |
EP1794223A1 (en) * | 2004-09-30 | 2007-06-13 | Honeywell International Inc. | Thermally conductive composite and uses for microelectronic packaging |
US7429915B2 (en) * | 2005-04-20 | 2008-09-30 | Honeywell International Inc. | System and method for detecting unauthorized access to electronic equipment or components |
US7189335B1 (en) * | 2005-08-31 | 2007-03-13 | Honeywell International Inc. | Conformal coverings for electronic devices |
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US7495554B2 (en) * | 2006-01-11 | 2009-02-24 | Honeywell International Inc. | Clamshell protective encasement |
US8710618B2 (en) | 2007-03-12 | 2014-04-29 | Honeywell International Inc. | Fibrous laminate interface for security coatings |
FI20085053A0 (en) * | 2008-01-22 | 2008-01-22 | Valtion Teknillinen | Method of performing thermal spraying and applications according to the procedure |
US20090317554A1 (en) * | 2008-06-24 | 2009-12-24 | Specialty Coating Systems, Inc. | Apparatus and method for spray coating |
DE102010010819A1 (en) | 2010-03-10 | 2011-09-15 | Osram Opto Semiconductors Gmbh | Method and device for producing a parylene coating |
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DE3318931C2 (en) * | 1983-05-25 | 1986-10-30 | Euroflamm Hansjörg Werner KG, 2820 Bremen | Process for spray coating objects and apparatus for carrying out the process |
DE3422718A1 (en) * | 1984-06-19 | 1986-01-09 | Plasmainvent AG, Zug | VACUUM PLASMA COATING SYSTEM |
JPS619565A (en) * | 1984-06-22 | 1986-01-17 | Tanaka Kikinzoku Kogyo Kk | Manufacture of metallic composite material |
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US4973526A (en) * | 1990-02-15 | 1990-11-27 | Dow Corning Corporation | Method of forming ceramic coatings and resulting articles |
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EP0771023A3 (en) * | 1995-10-27 | 1999-03-24 | Honeywell Inc. | Method of applying a protective coating on a semiconductor integrated circuit |
-
1996
- 1996-11-15 US US08/751,146 patent/US5762711A/en not_active Expired - Lifetime
-
1997
- 1997-11-11 DE DE69728492T patent/DE69728492T2/en not_active Expired - Fee Related
- 1997-11-11 EP EP97119688A patent/EP0842707B1/en not_active Expired - Lifetime
-
1998
- 1998-04-18 US US09/061,847 patent/US6110537A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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US6110537A (en) | 2000-08-29 |
EP0842707A1 (en) | 1998-05-20 |
EP0842707B1 (en) | 2004-04-07 |
US5762711A (en) | 1998-06-09 |
DE69728492D1 (en) | 2004-05-13 |
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